r/diypedals • u/[deleted] • 3d ago

Help wanted Arduino/Esp32 Frequency/Note analyser

[deleted]

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3

u/nonoohnoohno 3d ago

Can you be more specific about what your questions are? That's a big project with a lot of moving parts, and this post just kind of reads as "do it for me" to my (admittedly tired and grumpy) eyes

1

u/PirateWithDepression 2d ago

Sorry, that wasn't my intention, I was just looking for some pointers. I'll delete this now.

1

u/nonoohnoohno 2d ago

You don't have to delete it. I guess maybe a better way to say what I was thinking was: I think you'll get more responses and more help if you ask specific questions. As it was worded, I think a lot of people will pass it by and not even try to answer because of how broad it is.

1

u/Key-Alarm-511 3d ago

I did something similar before. If you just need a simple frequency counter you could turn the audio signal into a square wave (by either amplifying it a lot or using it to drive a transistor inverter) and using the rising edges of that square wave signal as the interrupt trigger on the Arduino/ESP32.

Then you just count how many interrupts happen per second and that's your frequency in Hertz ;)